Method and device for producing of a form part

Abstract

The invention relates to a method for producing of a form part, especially of a plane thin-walled fiber composite part, in a mold ( 1 ), comprising the steps: a) Providing of the mold ( 1 ), wherein the mold ( 1 ) comprises a cavity ( 2 ) with a nominal form volume (V) for inserting of a reactive mixture, wherein the cavity ( 2 ) is delimited by at least one cavity wall section ( 3 ) which is elastically deformable during the inserting of the reactive mixture and wherein the modulus of compressibility (K) of the cavity ( 2 ) is between 2,000 bar and 10,000 bar; b) Inserting of the reactive mixture into the cavity ( 2 ), wherein the reactive mixture is inserted with such a pressure into the cavity ( 2 ) so that the cavity volume is increased during the insertion of the reactive mixture due to elastic deformation of the at least one cavity wall section ( 3 ) above the nominal form volume (V); c) Letting solidify of the reactive mixture in the cavity ( 2 ); d) Demolding of the finished form part from the mold ( 1 ). Furthermore, the invention relates to a device for the execution of the method.

The invention claimed is: 
     
       1. A method for producing of a form part of a plane thin-walled fiber composite part, in a mould, comprising the steps:
 a) providing a mould, wherein the mould comprises a cavity with a nominal form volume for inserting of a reactive mixture, wherein the cavity is delimited by at least one cavity wall section which is elastically deformable during the inserting of the reactive mixture and wherein the cavity has a modulus of compressibility between 2,000 bar and 10,000 bar; 
 b) inserting the reactive mixture into the cavity, wherein the reactive mixture is inserted with such a pressure into the cavity so that the cavity volume is increased during the insertion of the reactive mixture due to elastic deformation of the at least one cavity wall section above the nominal form volume; 
 c) solidifying the reactive mixture in the cavity; and 
 d) demoulding a finished form part from the mould. 
 
     
     
       2. The method according to  claim 1 , wherein prior the insertion of the reactive mixture into the cavity according to step b) fiber material is inlayed into the cavity. 
     
     
       3. The method according to  claim 1 , wherein the reactive mixture is inserted during step b) such that the inner mould pressure is between 10 bar and 100 bar. 
     
     
       4. The method according to  claim 1 , wherein after the processing of step b) and prior to the processing of step d), an outer pressure, being one of a pneumatic and a hydraulic pressure, is applied to the at least one cavity wall section, so that the at least one cavity wall section is deformed and the volume of the cavity is reduced. 
     
     
       5. The method according to  claim 4 , wherein the outer pressure which is applied to the at least one cavity wall section is controlled or feed-back controlled such that the pressure in the reactive mixture in the cavity, which is not yet solidified, is kept constant. 
     
     
       6. The method according to  claim 4 , wherein the outer pressure which is applied to the at least one cavity wall section is increased during solidification of the reactive mixture. 
     
     
       7. The method according to  claim 4 , wherein the outer pressure which is applied to the at least one cavity wall section is decreased during solidification of the reactive mixture. 
     
     
       8. The method according to  claim 4 , wherein the pressure in the reactive mixture in the cavity is at least 50 bar immediately after the insertion of the reactive mixture according to step b), and wherein the outer pressure which is applied to the at least one cavity wall section is controlled or feed-back controlled in such that the pressure in the reactive mixture in the cavity decreases from the pressure level of at least 50 bar while the reactive mixture in the cavity solidifies according to step c). 
     
     
       9. The method according to  claim 4 , wherein the outer pressure which is applied to the at least one cavity wall section is controlled or feed-back controlled such that the deformation of the at least one cavity wall section becomes zero till the end of solidifying the reactive mixture according to step c). 
     
     
       10. Device comprising a mould with a cavity with a nominal form volume for execution of the method according to  claim 1 ,
 wherein 
 the cavity comprises at least one cavity wall section which delimits the cavity and which is designed in such a way that it deforms elastically during the insertion of the reactive mixture, wherein the modulus of compressibility of the cavity is between 2,000 bar and 10,000 bar. 
 
     
     
       11. Device according to  claim 10 , wherein the at least one elastically deformable cavity wall section is connected with means by which an external pressure can be applied onto the cavity wall section.